The drive from Fort Worth, TX to Karnes City, TX covers 289.6 miles and takes about 5h 7m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on South Freeway, TX 130 Toll, TX 80 for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 82.3 miles on South Freeway.
At current regular gas prices, budget about $43.76 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
144.8 miles from Fort Worth, TX
A natural place for your longest stop of the day
, about 2h 30m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 7m. Total distance: 289.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 7m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (83%). Some complex stretches to watch for.
Drive Character
This is a 5h 7m highway drive covering 289.6 miles, with most of the trip on South Freeway and TX 130 Toll. The longest continuous stretch is about 82.3 miles on South Freeway.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 19 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
South Freeway is the longest continuous segment at about 82.3 miles.
Elevation Profile
Mostly flat terrain
888 ft396 ft
Total Climb
949 ft
Total Descent
1,172 ft
Highest Point
888 ft
~144.8 mi in
Elevation Range
492 ft
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on South Freeway and TX 130 Toll. You will hit about 8 points where you need to pay attention to lane position or signs. The trickiest moment comes early in the drive.
Driving Effort5/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 289.6 miles you will encounter 8 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: near the start: Lane positioning matters here; at 0.3 miles (I 35W / South Freeway): Merge point - match speed before joining. Lane positioning matters here; at 127.1 miles (I 35): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 8 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
6
0 mi into trip|~0m in
Take the ramp toward I 35W South
Lane positioning matters here
Use the straight / slight left lanes.
Toward I 35W South
5
0.3 mi into trip|~0m in|I 35W / South Freeway
Merge onto I 35W / South Freeway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
127.1 mi into trip|~2h 12m in|I 35
Keep slight left at fork onto I 35
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
7
153.6 mi into trip|~2h 39m in
Take the exit toward TX 130 Toll South: San Antonio
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 265
Toward TX 130 Toll South: San Antonio
7
212.8 mi into trip|~3h 35m in
Take the exit toward US 183 South: Lockhart
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 470
Toward US 183 South: Lockhart
Main Roads
Road
Distance
Duration
South Freeway
82.3 mi
1h 25m
TX 130 Toll
58.5 mi
54m
TX 80
55.9 mi
1h 2m
Purple Heart Trail
37.9 mi
39m
I 35
26.5 mi
26m
US 183
10.1 mi
11m
North Jack Kultgen Expressway
6.6 mi
7m
North Colorado Street
4.9 mi
8m
Longest stretch:
South Freeway
— 82.3 mi, about 1h 25m
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Worth, TX and Karnes City, TX.
1
Start on South Freeway
174 ft·3 sec·South Freeway
2
Take the ramp
0.3 mi·33 sec
Toward I 35W SouthUse the straight / slight left lanes.
3
Merge onto I 35W
82 mi·1 hr 25 min·South Freeway
Use the straight / slight right lanes.
4
Continue on I 35; US 77
6.6 mi·7 min·North Jack Kultgen Expressway
Use the straight / slight right lanes.
5
Continue on I 35
38 mi·39 min·Purple Heart Trail
Use the straight / slight right lanes.
6
Keep slight left at fork onto I 35
26 mi·26 min·I 35
Use the straight / slight right lanes.
7
Take the exit
0.7 mi·55 sec
Exit 265Toward TX 130 Toll South: San AntonioUse the slight right lane.
8
Continue on TX 130 Toll
59 mi·54 min·TX 130 Toll
Use the straight / slight right lanes.
9
Take the exit
0.2 mi·29 sec
Exit 470Toward US 183 South: LockhartUse the straight / slight right lanes.
10
Continue on US 183
0.5 mi·35 sec·United States Highway 183
11
Continue on US 183
4.9 mi·8 min·North Colorado Street
12
Continue on US 183
10 mi·11 min·US 183
13
Continue on US 183
4.2 mi·6 min·North Magnolia Avenue
14
Continue on TX 80
56 mi·1 hr 2 min·TX 80
15
Turn left onto TX 80; TX 123
0.3 mi·43 sec·North Badger Drive
16
Turn right onto Weir Street
45 ft·4 sec·Weir Street
17
Turn left onto Badgerette Drive
0.2 mi·19 sec·Badgerette Drive
18
Turn straight onto US 181 Business
0.3 mi·35 sec·East Calvert Avenue
19
Arrive at destination
US 181 Business
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 144.8 miles from Fort Worth, TX, or about 2h 30m into the drive.
The longest continuous stretch on this route runs about 82.3 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 64 miles or 1h 6m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 144.8 miles or 2h 30m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 8m
Traffic, exits, and arrival timing usually matter more near Karnes City, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Fort Worth, TX so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Fort Worth, TX
This is one driving day of about 289.6 miles and 5h 7m.
Your first comfortable stop window is around 64 miles from Fort Worth, TX.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on South Freeway for about 82.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 144.8 mi from Fort Worth, TX
· 2h 30m into the drive
Place data sourced from public business listings. Hours and availability may vary.
National Parks Near This Route
Worth a detour if your schedule allows.
Waco Mammoth National Monument
National Monument
Standing as tall as 14 feet and weighing 20,000 pounds, Columbian mammoths roamed across what is present-day Texas thousands of years ago. Today, the fossil specimens represent the nation's first and...
5 mi from route
~12 min detour
Free
near mile 79.9
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $30 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
86.9
1
$30.41
$13.90
Efficient EV
72.4
0
$25.34
$11.58
EV Truck/SUV
115.8
1
$40.54
$18.53
Gas CO2
101 kg
EV CO2
34 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 17, 2026
Origin
Fort Worth, TX
Afternoon
in Fort Worth on Friday
Local time
2:39 PM
CDT
Current temp
84°F
Mostly Cloudy
S 10 to 15 mph6% chanceLive forecast
Red Flag Warning
Red Flag Warning issued April 17 at 7:31AM CDT until April 17 at 9:00PM CDT by NWS Amarillo TX
Wind Advisory
Wind Advisory issued April 17 at 7:25AM CDT until April 18 at 7:00AM CDT by NWS Amarillo TX
Destination
Karnes City, TX
Afternoon
in Karnes City on Friday
Local time
2:39 PM
CDT
Current temp
64°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
20 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 7m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Fort Worth, TX to Karnes City, TX covers 289.6 miles and takes about 5h 7m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are South Freeway, TX 130 Toll, TX 80. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 144.8 miles from Fort Worth, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $43.76 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This drive requires moderate attention. Across 289.6 miles you will encounter 8 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: near the start: Lane positioning matters here; at 0.3 miles (I 35W / South Freeway): Merge point - match speed before joining. Lane positioning matters here; at 127.1 miles (I 35): Highway fork - watch signs carefully. Lane positioning matters here.
The route from Fort Worth, TX to Karnes City, TX does not surface many named destination signs beyond the main corridor.
Mostly flat terrain. The route ranges from 396 ft to 888 ft elevation with about 949 ft of total climbing.
Yes. Nearby national parks include Waco Mammoth National Monument.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, USGS 3DEP for elevation, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
